years of unprescribed medication
Green’s guilt, pain, fear and self-loathing have over years of unprescribed medication been compressed to the igneous point where he now knows only that he compulsively avoids any product or service with ’N in its name
Context
The addiction stated as its own etiology: the unbearable childhood freight — guilt, pain, fear, self-loathing — has been compressed by "years of unprescribed medication" into something small, hard, and igneous, the trauma buried under the drug that was self-administered to bury it. The book names the substance as medication for a wound and marks the cost of that medication in the same clause: what surfaces now are only displaced tics, the feeling itself pressed too deep to reach without the sober strip-mining the House exists to make him do.